[linux-2.6-block.git] / fs / nfs / nfs42proc.c

/*
 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
 */
#include <linux/fs.h>
#include <linux/sunrpc/sched.h>
#include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs4.h>
#include <linux/nfs_xdr.h>
#include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#include "nfs42.h"
#include "iostat.h"
#include "pnfs.h"
#include "internal.h"

#define NFSDBG_FACILITY NFSDBG_PROC

static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
		struct nfs_lock_context *lock, loff_t offset, loff_t len)
{
	struct inode *inode = file_inode(filep);
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs42_falloc_args args = {
		.falloc_fh	= NFS_FH(inode),
		.falloc_offset	= offset,
		.falloc_length	= len,
		.falloc_bitmask	= server->cache_consistency_bitmask,
	};
	struct nfs42_falloc_res res = {
		.falloc_server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
			lock, FMODE_WRITE);
	if (status)
		return status;

	res.falloc_fattr = nfs_alloc_fattr();
	if (!res.falloc_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(inode, res.falloc_fattr);

	kfree(res.falloc_fattr);
	return status;
}

static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
				loff_t offset, loff_t len)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	struct nfs_lock_context *lock;
	int err;

	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	if (IS_ERR(lock))
		return PTR_ERR(lock);

	exception.inode = file_inode(filep);
	exception.state = lock->open_context->state;

	do {
		err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	nfs_put_lock_context(lock);
	return err;
}

int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
		return -EOPNOTSUPP;

	inode_lock(inode);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;

	inode_unlock(inode);
	return err;
}

int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
		return -EOPNOTSUPP;

	nfs_wb_all(inode);
	inode_lock(inode);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == 0)
		truncate_pagecache_range(inode, offset, (offset + len) -1);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;

	inode_unlock(inode);
	return err;
}

static loff_t _nfs42_proc_llseek(struct file *filep,
		struct nfs_lock_context *lock, loff_t offset, int whence)
{
	struct inode *inode = file_inode(filep);
	struct nfs42_seek_args args = {
		.sa_fh		= NFS_FH(inode),
		.sa_offset	= offset,
		.sa_what	= (whence == SEEK_HOLE) ?
					NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	};
	struct nfs42_seek_res res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	struct nfs_server *server = NFS_SERVER(inode);
	int status;

	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
		return -ENOTSUPP;

	status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
			lock, FMODE_READ);
	if (status)
		return status;

	nfs_wb_all(inode);
	status = nfs4_call_sync(server->client, server, &msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == -ENOTSUPP)
		server->caps &= ~NFS_CAP_SEEK;
	if (status)
		return status;

	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
}

loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	struct nfs_lock_context *lock;
	loff_t err;

	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	if (IS_ERR(lock))
		return PTR_ERR(lock);

	exception.inode = file_inode(filep);
	exception.state = lock->open_context->state;

	do {
		err = _nfs42_proc_llseek(filep, lock, offset, whence);
		if (err >= 0)
			break;
		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	nfs_put_lock_context(lock);
	return err;
}


static void
nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct nfs_server *server = NFS_SERVER(data->args.inode);

	nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
			     &data->res.seq_res, task);
}

static void
nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct inode *inode = data->inode;
	struct pnfs_layout_hdr *lo;

	if (!nfs4_sequence_done(task, &data->res.seq_res))
		return;

	switch (task->tk_status) {
	case 0:
		break;
	case -NFS4ERR_EXPIRED:
	case -NFS4ERR_STALE_STATEID:
	case -NFS4ERR_OLD_STATEID:
	case -NFS4ERR_BAD_STATEID:
		spin_lock(&inode->i_lock);
		lo = NFS_I(inode)->layout;
		if (lo && nfs4_stateid_match(&data->args.stateid,
					     &lo->plh_stateid)) {
			LIST_HEAD(head);

			/*
			 * Mark the bad layout state as invalid, then retry
			 * with the current stateid.
			 */
			set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
			pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
			spin_unlock(&inode->i_lock);
			pnfs_free_lseg_list(&head);
		} else
			spin_unlock(&inode->i_lock);
		break;
	case -ENOTSUPP:
	case -EOPNOTSUPP:
		NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
	default:
		break;
	}

	dprintk("%s server returns %d\n", __func__, task->tk_status);
}

static void
nfs42_layoutstat_release(void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct nfs_server *nfss = NFS_SERVER(data->args.inode);

	if (nfss->pnfs_curr_ld->cleanup_layoutstats)
		nfss->pnfs_curr_ld->cleanup_layoutstats(data);

	pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
	smp_mb__before_atomic();
	clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
	smp_mb__after_atomic();
	nfs_iput_and_deactive(data->inode);
	kfree(data->args.devinfo);
	kfree(data);
}

static const struct rpc_call_ops nfs42_layoutstat_ops = {
	.rpc_call_prepare = nfs42_layoutstat_prepare,
	.rpc_call_done = nfs42_layoutstat_done,
	.rpc_release = nfs42_layoutstat_release,
};

int nfs42_proc_layoutstats_generic(struct nfs_server *server,
				   struct nfs42_layoutstat_data *data)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
		.rpc_argp = &data->args,
		.rpc_resp = &data->res,
	};
	struct rpc_task_setup task_setup = {
		.rpc_client = server->client,
		.rpc_message = &msg,
		.callback_ops = &nfs42_layoutstat_ops,
		.callback_data = data,
		.flags = RPC_TASK_ASYNC,
	};
	struct rpc_task *task;

	data->inode = nfs_igrab_and_active(data->args.inode);
	if (!data->inode) {
		nfs42_layoutstat_release(data);
		return -EAGAIN;
	}
	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
	task = rpc_run_task(&task_setup);
	if (IS_ERR(task))
		return PTR_ERR(task);
	return 0;
}

static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
		struct file *dst_f, struct nfs_lock_context *src_lock,
		struct nfs_lock_context *dst_lock, loff_t src_offset,
		loff_t dst_offset, loff_t count)
{
	struct inode *src_inode = file_inode(src_f);
	struct inode *dst_inode = file_inode(dst_f);
	struct nfs_server *server = NFS_SERVER(dst_inode);
	struct nfs42_clone_args args = {
		.src_fh = NFS_FH(src_inode),
		.dst_fh = NFS_FH(dst_inode),
		.src_offset = src_offset,
		.dst_offset = dst_offset,
		.count = count,
		.dst_bitmask = server->cache_consistency_bitmask,
	};
	struct nfs42_clone_res res = {
		.server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
			src_lock, FMODE_READ);
	if (status)
		return status;

	status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
			dst_lock, FMODE_WRITE);
	if (status)
		return status;

	res.dst_fattr = nfs_alloc_fattr();
	if (!res.dst_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);

	kfree(res.dst_fattr);
	return status;
}

int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
		     loff_t src_offset, loff_t dst_offset, loff_t count)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
	};
	struct inode *inode = file_inode(src_f);
	struct nfs_server *server = NFS_SERVER(file_inode(src_f));
	struct nfs_lock_context *src_lock;
	struct nfs_lock_context *dst_lock;
	struct nfs4_exception src_exception = { };
	struct nfs4_exception dst_exception = { };
	int err, err2;

	if (!nfs_server_capable(inode, NFS_CAP_CLONE))
		return -EOPNOTSUPP;

	src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
	if (IS_ERR(src_lock))
		return PTR_ERR(src_lock);

	src_exception.inode = file_inode(src_f);
	src_exception.state = src_lock->open_context->state;

	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
	if (IS_ERR(dst_lock)) {
		err = PTR_ERR(dst_lock);
		goto out_put_src_lock;
	}

	dst_exception.inode = file_inode(dst_f);
	dst_exception.state = dst_lock->open_context->state;

	do {
		err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
					src_offset, dst_offset, count);
		if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
			NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
			err = -EOPNOTSUPP;
			break;
		}

		err2 = nfs4_handle_exception(server, err, &src_exception);
		err = nfs4_handle_exception(server, err, &dst_exception);
		if (!err)
			err = err2;
	} while (src_exception.retry || dst_exception.retry);

	nfs_put_lock_context(dst_lock);
out_put_src_lock:
	nfs_put_lock_context(src_lock);
	return err;
}
Commit	Line	Data
1c6dcbe5 AS	1	/*
	2	* Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
	3	*/
	4	#include <linux/fs.h>
	5	#include <linux/sunrpc/sched.h>
	6	#include <linux/nfs.h>
	7	#include <linux/nfs3.h>
	8	#include <linux/nfs4.h>
	9	#include <linux/nfs_xdr.h>
	10	#include <linux/nfs_fs.h>
	11	#include "nfs4_fs.h"
	12	#include "nfs42.h"
1b4a4bd8 PT	13	#include "iostat.h"
	14	#include "pnfs.h"
	15	#include "internal.h"
	16
291e1b94	17	#define NFSDBG_FACILITY NFSDBG_PROC
1c6dcbe5	18
f4ac1674	19	static int _nfs42_proc_fallocate(struct rpc_message msg, struct file filep,
4bdf87eb	20	struct nfs_lock_context *lock, loff_t offset, loff_t len)
f4ac1674 AS	21	{
f4ac1674 AS	22	struct inode *inode = file_inode(filep);
9a51940b	23	struct nfs_server *server = NFS_SERVER(inode);
f4ac1674 AS	24	struct nfs42_falloc_args args = {
	25	.falloc_fh = NFS_FH(inode),
	26	.falloc_offset = offset,
	27	.falloc_length = len,
9a51940b AS	28	.falloc_bitmask = server->cache_consistency_bitmask,
	29	};
	30	struct nfs42_falloc_res res = {
	31	.falloc_server = server,
f4ac1674	32	};
f4ac1674 AS	33	int status;
	34
	35	msg->rpc_argp = &args;
	36	msg->rpc_resp = &res;
	37
4bdf87eb CH	38	status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
4bdf87eb CH	39	lock, FMODE_WRITE);
f4ac1674 AS	40	if (status)
	41	return status;
	42
9a51940b AS	43	res.falloc_fattr = nfs_alloc_fattr();
	44	if (!res.falloc_fattr)
	45	return -ENOMEM;
	46
	47	status = nfs4_call_sync(server->client, server, msg,
	48	&args.seq_args, &res.seq_res, 0);
	49	if (status == 0)
	50	status = nfs_post_op_update_inode(inode, res.falloc_fattr);
	51
	52	kfree(res.falloc_fattr);
	53	return status;
f4ac1674 AS	54	}
	55
	56	static int nfs42_proc_fallocate(struct rpc_message msg, struct file filep,
	57	loff_t offset, loff_t len)
	58	{
	59	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	60	struct nfs4_exception exception = { };
4bdf87eb	61	struct nfs_lock_context *lock;
f4ac1674 AS	62	int err;
f4ac1674 AS	63
4bdf87eb CH	64	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	65	if (IS_ERR(lock))
	66	return PTR_ERR(lock);
	67
	68	exception.inode = file_inode(filep);
	69	exception.state = lock->open_context->state;
	70
f4ac1674	71	do {
4bdf87eb CH	72	err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
	73	if (err == -ENOTSUPP) {
	74	err = -EOPNOTSUPP;
	75	break;
	76	}
f4ac1674 AS	77	err = nfs4_handle_exception(server, err, &exception);
	78	} while (exception.retry);
	79
4bdf87eb	80	nfs_put_lock_context(lock);
f4ac1674 AS	81	return err;
	82	}
	83
	84	int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
	85	{
	86	struct rpc_message msg = {
	87	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
	88	};
	89	struct inode *inode = file_inode(filep);
	90	int err;
	91
	92	if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
	93	return -EOPNOTSUPP;
	94
5955102c	95	inode_lock(inode);
f830f7dd	96
f4ac1674 AS	97	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	98	if (err == -EOPNOTSUPP)
	99	NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
f830f7dd	100
5955102c	101	inode_unlock(inode);
f4ac1674 AS	102	return err;
	103	}
	104
624bd5b7 AS	105	int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
	106	{
	107	struct rpc_message msg = {
	108	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
	109	};
	110	struct inode *inode = file_inode(filep);
	111	int err;
	112
	113	if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
	114	return -EOPNOTSUPP;
	115
9a51940b	116	nfs_wb_all(inode);
5955102c	117	inode_lock(inode);
f830f7dd	118
624bd5b7	119	err = nfs42_proc_fallocate(&msg, filep, offset, len);
9a51940b AS	120	if (err == 0)
9a51940b AS	121	truncate_pagecache_range(inode, offset, (offset + len) -1);
624bd5b7 AS	122	if (err == -EOPNOTSUPP)
624bd5b7 AS	123	NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
f830f7dd	124
5955102c	125	inode_unlock(inode);
624bd5b7 AS	126	return err;
	127	}
	128
4bdf87eb CH	129	static loff_t _nfs42_proc_llseek(struct file *filep,
4bdf87eb CH	130	struct nfs_lock_context *lock, loff_t offset, int whence)
1c6dcbe5 AS	131	{
	132	struct inode *inode = file_inode(filep);
	133	struct nfs42_seek_args args = {
	134	.sa_fh = NFS_FH(inode),
	135	.sa_offset = offset,
	136	.sa_what = (whence == SEEK_HOLE) ?
	137	NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	138	};
	139	struct nfs42_seek_res res;
	140	struct rpc_message msg = {
	141	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
	142	.rpc_argp = &args,
	143	.rpc_resp = &res,
	144	};
	145	struct nfs_server *server = NFS_SERVER(inode);
	146	int status;
	147
878ffa9f	148	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
1c6dcbe5 AS	149	return -ENOTSUPP;
1c6dcbe5 AS	150
4bdf87eb CH	151	status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
4bdf87eb CH	152	lock, FMODE_READ);
1c6dcbe5 AS	153	if (status)
	154	return status;
	155
	156	nfs_wb_all(inode);
	157	status = nfs4_call_sync(server->client, server, &msg,
	158	&args.seq_args, &res.seq_res, 0);
	159	if (status == -ENOTSUPP)
	160	server->caps &= ~NFS_CAP_SEEK;
	161	if (status)
	162	return status;
	163
	164	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
	165	}
be3a5d23	166
bdcc2cd1 BF	167	loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
	168	{
	169	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	170	struct nfs4_exception exception = { };
4bdf87eb	171	struct nfs_lock_context *lock;
306a5549	172	loff_t err;
bdcc2cd1	173
4bdf87eb CH	174	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	175	if (IS_ERR(lock))
	176	return PTR_ERR(lock);
	177
	178	exception.inode = file_inode(filep);
	179	exception.state = lock->open_context->state;
	180
bdcc2cd1	181	do {
4bdf87eb	182	err = _nfs42_proc_llseek(filep, lock, offset, whence);
306a5549 BF	183	if (err >= 0)
306a5549 BF	184	break;
4bdf87eb CH	185	if (err == -ENOTSUPP) {
	186	err = -EOPNOTSUPP;
	187	break;
	188	}
bdcc2cd1 BF	189	err = nfs4_handle_exception(server, err, &exception);
	190	} while (exception.retry);
	191
4bdf87eb	192	nfs_put_lock_context(lock);
bdcc2cd1 BF	193	return err;
	194	}
	195
	196
1b4a4bd8 PT	197	static void
	198	nfs42_layoutstat_prepare(struct rpc_task task, void calldata)
	199	{
	200	struct nfs42_layoutstat_data *data = calldata;
	201	struct nfs_server *server = NFS_SERVER(data->args.inode);
	202
	203	nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
	204	&data->res.seq_res, task);
	205	}
	206
	207	static void
	208	nfs42_layoutstat_done(struct rpc_task task, void calldata)
	209	{
	210	struct nfs42_layoutstat_data *data = calldata;
68d264cf PT	211	struct inode *inode = data->inode;
68d264cf PT	212	struct pnfs_layout_hdr *lo;
1b4a4bd8 PT	213
	214	if (!nfs4_sequence_done(task, &data->res.seq_res))
	215	return;
	216
6c5a0d89 TM	217	switch (task->tk_status) {
	218	case 0:
	219	break;
68d264cf PT	220	case -NFS4ERR_EXPIRED:
	221	case -NFS4ERR_STALE_STATEID:
	222	case -NFS4ERR_OLD_STATEID:
	223	case -NFS4ERR_BAD_STATEID:
	224	spin_lock(&inode->i_lock);
	225	lo = NFS_I(inode)->layout;
	226	if (lo && nfs4_stateid_match(&data->args.stateid,
	227	&lo->plh_stateid)) {
	228	LIST_HEAD(head);
	229
	230	/*
	231	* Mark the bad layout state as invalid, then retry
	232	* with the current stateid.
	233	*/
	234	set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
	235	pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
	236	spin_unlock(&inode->i_lock);
	237	pnfs_free_lseg_list(&head);
	238	} else
	239	spin_unlock(&inode->i_lock);
	240	break;
6c5a0d89 TM	241	case -ENOTSUPP:
6c5a0d89 TM	242	case -EOPNOTSUPP:
68d264cf	243	NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
6c5a0d89	244	default:
68d264cf	245	break;
6c5a0d89	246	}
68d264cf PT	247
68d264cf PT	248	dprintk("%s server returns %d\n", __func__, task->tk_status);
1b4a4bd8 PT	249	}
	250
	251	static void
	252	nfs42_layoutstat_release(void *calldata)
	253	{
	254	struct nfs42_layoutstat_data *data = calldata;
8733408d PT	255	struct nfs_server *nfss = NFS_SERVER(data->args.inode);
	256
	257	if (nfss->pnfs_curr_ld->cleanup_layoutstats)
	258	nfss->pnfs_curr_ld->cleanup_layoutstats(data);
1b4a4bd8 PT	259
1b4a4bd8 PT	260	pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
1bfe3b25 PT	261	smp_mb__before_atomic();
	262	clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
	263	smp_mb__after_atomic();
1b4a4bd8 PT	264	nfs_iput_and_deactive(data->inode);
	265	kfree(data->args.devinfo);
	266	kfree(data);
	267	}
	268
be3a5d23	269	static const struct rpc_call_ops nfs42_layoutstat_ops = {
1b4a4bd8 PT	270	.rpc_call_prepare = nfs42_layoutstat_prepare,
	271	.rpc_call_done = nfs42_layoutstat_done,
	272	.rpc_release = nfs42_layoutstat_release,
be3a5d23 TM	273	};
	274
	275	int nfs42_proc_layoutstats_generic(struct nfs_server *server,
	276	struct nfs42_layoutstat_data *data)
	277	{
	278	struct rpc_message msg = {
	279	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
	280	.rpc_argp = &data->args,
	281	.rpc_resp = &data->res,
	282	};
	283	struct rpc_task_setup task_setup = {
	284	.rpc_client = server->client,
	285	.rpc_message = &msg,
	286	.callback_ops = &nfs42_layoutstat_ops,
	287	.callback_data = data,
	288	.flags = RPC_TASK_ASYNC,
	289	};
	290	struct rpc_task *task;
	291
1b4a4bd8 PT	292	data->inode = nfs_igrab_and_active(data->args.inode);
	293	if (!data->inode) {
	294	nfs42_layoutstat_release(data);
	295	return -EAGAIN;
	296	}
be3a5d23 TM	297	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
	298	task = rpc_run_task(&task_setup);
	299	if (IS_ERR(task))
	300	return PTR_ERR(task);
	301	return 0;
	302	}
e5341f3a PT	303
e5341f3a PT	304	static int _nfs42_proc_clone(struct rpc_message msg, struct file src_f,
4bdf87eb CH	305	struct file dst_f, struct nfs_lock_context src_lock,
	306	struct nfs_lock_context *dst_lock, loff_t src_offset,
	307	loff_t dst_offset, loff_t count)
e5341f3a PT	308	{
	309	struct inode *src_inode = file_inode(src_f);
	310	struct inode *dst_inode = file_inode(dst_f);
	311	struct nfs_server *server = NFS_SERVER(dst_inode);
	312	struct nfs42_clone_args args = {
	313	.src_fh = NFS_FH(src_inode),
	314	.dst_fh = NFS_FH(dst_inode),
	315	.src_offset = src_offset,
	316	.dst_offset = dst_offset,
9494b2ce	317	.count = count,
e5341f3a PT	318	.dst_bitmask = server->cache_consistency_bitmask,
	319	};
	320	struct nfs42_clone_res res = {
	321	.server = server,
	322	};
	323	int status;
	324
	325	msg->rpc_argp = &args;
	326	msg->rpc_resp = &res;
	327
4bdf87eb CH	328	status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
4bdf87eb CH	329	src_lock, FMODE_READ);
e5341f3a PT	330	if (status)
	331	return status;
	332
4bdf87eb CH	333	status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
4bdf87eb CH	334	dst_lock, FMODE_WRITE);
e5341f3a PT	335	if (status)
	336	return status;
	337
	338	res.dst_fattr = nfs_alloc_fattr();
	339	if (!res.dst_fattr)
	340	return -ENOMEM;
	341
	342	status = nfs4_call_sync(server->client, server, msg,
	343	&args.seq_args, &res.seq_res, 0);
	344	if (status == 0)
	345	status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
	346
	347	kfree(res.dst_fattr);
	348	return status;
	349	}
	350
	351	int nfs42_proc_clone(struct file src_f, struct file dst_f,
	352	loff_t src_offset, loff_t dst_offset, loff_t count)
	353	{
	354	struct rpc_message msg = {
	355	.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
	356	};
	357	struct inode *inode = file_inode(src_f);
	358	struct nfs_server *server = NFS_SERVER(file_inode(src_f));
4bdf87eb CH	359	struct nfs_lock_context *src_lock;
	360	struct nfs_lock_context *dst_lock;
	361	struct nfs4_exception src_exception = { };
	362	struct nfs4_exception dst_exception = { };
	363	int err, err2;
e5341f3a PT	364
	365	if (!nfs_server_capable(inode, NFS_CAP_CLONE))
	366	return -EOPNOTSUPP;
	367
4bdf87eb CH	368	src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
	369	if (IS_ERR(src_lock))
	370	return PTR_ERR(src_lock);
	371
	372	src_exception.inode = file_inode(src_f);
	373	src_exception.state = src_lock->open_context->state;
	374
	375	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
	376	if (IS_ERR(dst_lock)) {
	377	err = PTR_ERR(dst_lock);
	378	goto out_put_src_lock;
	379	}
	380
	381	dst_exception.inode = file_inode(dst_f);
	382	dst_exception.state = dst_lock->open_context->state;
	383
e5341f3a	384	do {
4bdf87eb CH	385	err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
4bdf87eb CH	386	src_offset, dst_offset, count);
e5341f3a PT	387	if (err == -ENOTSUPP \|\| err == -EOPNOTSUPP) {
e5341f3a PT	388	NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
4bdf87eb CH	389	err = -EOPNOTSUPP;
4bdf87eb CH	390	break;
e5341f3a	391	}
e5341f3a	392
4bdf87eb CH	393	err2 = nfs4_handle_exception(server, err, &src_exception);
	394	err = nfs4_handle_exception(server, err, &dst_exception);
	395	if (!err)
	396	err = err2;
	397	} while (src_exception.retry \|\| dst_exception.retry);
e5341f3a	398
4bdf87eb CH	399	nfs_put_lock_context(dst_lock);
	400	out_put_src_lock:
	401	nfs_put_lock_context(src_lock);
	402	return err;
e5341f3a	403	}